Chemistry
breef
2

How many calories are absorbed by a copper spoon with a mass of 200 grams as it changes from 28°C to 33°C?

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(1) Answers
JamieJamieJamie

Calories is a unit of energy, so we need to calculate the energy or heat absorbed or released by the system. We use the equation: U = mCpΔT where: m = mass of material Cp = specific heat capacity of material ΔT = (Tf - Ti) = temperature change First, you must look for the specific heat capacity of copper. You can use any chemistry or engineering book or website. According to Engineering Toolbox, the specific heat capacity of copper is 0.09 cal/(g-°C). U = 200(0.09)(33-28) = 90 calories Since the value is positive, energy is absorbed.

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